See SRM try to maintains uniformity among all of it campuses. But the uniformity isn't the ideal suit for a chaotic world like us. So yeah! the main campus is better than Ramapuram in terms of Faculty and Infrastructure. So if you have chance you should take admission in the main branch rather than Ramapuram.

To know more about SRM you may visit the link provided below:

https://www.careers360.com/colleges/srm-institute-of-science-and-technology-ramapuram-campus

I hope my answer helps. All the very best for your future endeavors!